Re: Removing An "Unwanted" Odor from hackle...
Ditto the Nature's Miracle recommendation by Gary above. Works surprisingly well with organic stains and odors. If you go this route, I'd suggest saturating each patch individually in a tray of product. Don't rinse; just allow to air dry. I haven't noticed any residue when having used it on carpet and fabric, but you may wish to wash the patches with a mild soap if you detect any difference in the feathers afterward.